Question

我已经制作了一个自定义导航栏，通过实现以下方法对所有视图都一样 - ：

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
//    viewController.navigationItem.rightBarButtonItem = cancelButton;
// -- Adding INFO button to Navigation bar --
UIBarButtonItem *infoButton =  [[UIBarButtonItem alloc]
                                initWithTitle:@"i"
                                style:UIBarButtonItemStyleBordered
                                target:self
                                action:@selector(showInfo)];
infoButton.tag = 10;
self.navCntrl.topViewController.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:infoButton, nil];
self.navCntrl.navigationBar.tintColor = [UIColor colorWithRed:45/255.0 green:77/255.0 blue:67/255.0 alpha:1];
//    NSLog(@"Inside implemented method");
}

UINavigationControllerDelegate的

。

在上面的方法中，我在导航项目中添加了一个右键。现在我想在特定视图中隐藏此右键。我怎样才能做到这一点？感谢。

Answer 1

尝试使用此

self.navigationItem.rightBarButtonItem = nil;
self.navigationItem.rightBarButtonItem.enabled = NO;

Answer 2

在viewDidLoad中，尝试

self.navigationItem.rightBarButtonItem = nil;

在viewWillDisappear中，不要忘记把它放回去。

Answer 3

使用此

self.navigationItem.rightBarButtonItem = nil;

Answer 4

一种很好的方法是让你的视图控制器实现一个协议。您选择名称，但它可以是CustomNavigationCustomization，并且只有一个方法：

@protocol CustomNavigationCustomization

- (BOOL)shouldShowRightButton;

@end

然后，您可以将方法更改为：

- (void)navigationController:(UINavigationController *)navigationController   
      willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

    BOOL shouldShowRightButton = YES;

    if ([viewController conformsToProtocol:@protocol(CustomNavigationCustomization)) {
        UIViewController <CustomNavigationCustomization> *customizableViewController =
                       (UIViewController <CustomNavigationCustomization>)viewController;

        shouldShowRightButton = [customizableViewController shouldShowRightButton];
    }

    if (shouldShowRightButton) {

        //    viewController.navigationItem.rightBarButtonItem = cancelButton;
        // -- Adding INFO button to Navigation bar --
        UIBarButtonItem *infoButton =  [[UIBarButtonItem alloc] initWithTitle:@"i"
                                                                        style:UIBarButtonItemStyleBordered
                                                                       target:self
                                                                       action:@selector(showInfo)];
        infoButton.tag = 10;
        self.navCntrl.topViewController.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:infoButton, nil];
        self.navCntrl.navigationBar.tintColor = [UIColor colorWithRed:45/255.0 green:77/255.0 blue:67/255.0 alpha:1];
        //    NSLog(@"Inside implemented method");
    }
}

请注意，导航控制器委托中的方法非常防御：它会检查您的视图控制器是否符合协议，然后才会调用该方法。这样，您不需要在大多数视图控制器中符合协议，只需要在您希望自定义的视图控制器中使用。

Answer 5

只需检查viewController是否推送了你不想要righ bar按钮的类型：

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {

    // Replace the YourViewController with the type of the viewcontroller 
    // you want not the have the right bar button.
    if ([viewController isKindOfClass:[YourViewController class]]) {
        return;
    }

    //    viewController.navigationItem.rightBarButtonItem = cancelButton;
    // -- Adding INFO button to Navigation bar --
    UIBarButtonItem *infoButton =  [[UIBarButtonItem alloc]
                                    initWithTitle:@"i"
                                    style:UIBarButtonItemStyleBordered
                                    target:self
                                    action:@selector(showInfo)];
    infoButton.tag = 10;
    self.navCntrl.topViewController.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:infoButton, nil];
    self.navCntrl.navigationBar.tintColor = [UIColor colorWithRed:45/255.0 green:77/255.0 blue:67/255.0 alpha:1];
    //    NSLog(@"Inside implemented method");
}

Answer 6

对于那些仍在寻找答案的人，这段代码在AppDelegate.m

中适用于我

 - (BOOL)application:(UIApplication *)applicationdidFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    ...
    //  Get rid of the edit button in UITabBarController's moreNavigationController
            tabBarController.customizableViewControllers = nil;
    ...
        }

iPhone：如何从视图控制器中的导航栏中删除右键？

6 个答案: